具有外向人格特質的CEO擅長與企業內外部的利害關係人建立關係，能夠有效地與人交流，建立信任和合作關係。由於他們具有冒險精神和對新想法的開放態度，他們傾向於主動尋求市場機會和業務拓展。本研究將考慮CEO特質因素，觀察當企業在執行多角化決策的過程中，是否會受到CEO外向性人格特質的影響，進而影響最終的經營績效是否符合預期。本研究主要探討CEO外向性人格特質對公司多角化的影響。本研究樣本選取2000年至2018年間的美國標準普爾1500公司進行實證測試。CEO 外向性的資料係取自Harrison et al.（2019）。Harrison et al. 採用機器學習演算法建構 CEO人格特質的衡量，其收集 S&P 公司之經理人演講文字稿，使用演算法將文字向量化、建立訓練模型、特質預測來衡量並驗證經理人的五大人格特質。本研究結果發現人格特質越外向的CEO，其對公司多角化程度的影響越高，而CEO外向性對公司多角化的正向影響隨著CEO權力愈大而更加明顯。

A CEO with an extroverted personality excels in building relationships with stakeholders both inside and outside the company. They are effective communicators, capable of fostering trust and cooperation. Their adventurous spirit and openness to new ideas drive them to proactively seek market opportunities and expand business ventures. This study explores how a CEO's extroverted personality influences the execution of diversification decisions, affecting the company's operational performance. The primary focus is to investigate the impact of CEO extroversion on corporate diversification. The study examines Standard & Poor's 1500 companies from 2000 to 2018. Data on CEO extroversion come from Harrison et al. (2019), who used machine learning algorithms to measure CEO personality traits. They analyzed executives' speech transcripts from S&P companies, vectorized the text, built training models, and predicted personality traits to quantify and validate the five major personality traits of executives. The study found that CEOs with higher extroversion traits significantly influence the company's diversification level. There is a notable positive correlation between extroverted CEOs and the degree of corporate diversification. Additionally, the impact varies with age, as younger extroverted CEOs have a greater influence on corporate diversification compared to their older counterparts.

方至民（2006）。策略管理。台北縣：前程文化。
方至民（2014）。策略管理概論：應用導向 2/e。新北市：前程文化。
洪于婷、何啟銘（2007）。國際化、集團效果、所有權結構與績效關係之研究以台灣上市之多國籍企業為例。
湯明哲（2003）。重新拿捏多角化策略。遠見雜誌 210 期，2003年12月。
Adebambo, B., Malhotra, S., & Zhu, P. (2018). CEO Extraversion and Expected Cost of Capital. Working paper, University of San Diego and University of Waterloo.
Aktas, N., Louca, C., & Petmezas, D. (2019). CEO overconfidence and the value of corporate cash holdings.Journal of Corporate Finance,54, 85-106.
Ali, A., & Zhang., W. (2015). CEO tenure and earnings management. Journal of Accounting and Economics 59, 60-79.
Amit, R., & Livnat, J. (1988). Diversification strategies, business cycles, and economic performance. Strategic Management Journal, 9, 99-110.
Andreou, P. C., Doukas, J. A., Koursaros, D., & Louca, C. (2019). Valuation effects of overconfident CEOs on corporate diversification and refocusing decisions. Journal of Banking & Finance, 100, 182-204.
Ansoff, H. I. (1957). Strategies for Diversification. Harvard Business Review, 35(5), 113-124.
Bai, L., Yan, X., & Yu, G. (2019). Impact of CEO media appearance on corporate performance in social media. The North American Journal of Economics and Finance, 50, 100996.
Barrick, M. R., & Mount, M. (1991). The big five personality dimensions and job performance: A meta-analysis. Personnel Psychology, 44, 1–26.
Bebczuk, R., & Galindo, A. (2008). Financial crisis and sectoral diversification of Argentine banks, 1999–2004. Applied Financial Economics, 18(3), 199-211.
Becker, J., Medjedovic, J., & Merkle, C. (2019). The Effect of CEO Extraversion on Analyst Forecasts: Stereotypes and Similarity Bias. Financial Review, 54(1), 133- 164.
Berger, G., & Ofek, E. (1995). Diversification's effect on firm value. Journal of Financial Economics, 37(1), 39-65.
Berry, H. (2015). Corporate growth and diversification. In Corporate Growth and Diversification. Princeton University Press.
Bono, E. & Judge, T.A. (2004). Personality and transformational and transactional leadership: A meta-analysis. Journal of Applied Psychology, 89(5), 901-910.
Booz, A., & Hamilton, B. (1985), Diversification: A Survey of European Chief Executives, Booz, Allen and Hamilton, Inc., New York.
Bowen, P., Baker, K., & Powell, E. (2015). Globalization and diversification strategy: A managerial perspective. Scandinavian Journal of Management, 31(1), 25-39.
Brown, R., & Sarma, N. (2007). CEO overconfidence, CEO dominance and corporate acquisitions. Journal of Economics and business, 59(5), 358-379.
Cain, S. (2012). Quiet: The power of introverts in a world that can’t stop talking. New York: Crown Publishers.
Campa, M. & Kedia, S. (2002). Explaining the Diversification Discount. Journal of Financial, 57(4), 1731-1762.
Cattell, B. (1956). Second-order personality factors in the questionnaire realm. Journal of Consulting Psychology, 20, 411-418.
Chen, S. & Kim, H. (2000). Corporate Diversification, Ownership Structure, and Firm Value: The Singapore Evidence, International Review of Financial Analysis, 9, 315-326.
Delios, A. & Beamish, W. (1999). Geographic Scope, Product Diversification, and the Corporate Performance of Japanese Firms. Management International Review, 20(8), 711-727.
Geringer, M., Stephen, T., & David, O. (2000). Product and international Diversification among Japanese multinational firms. Strategic Management Journal, 21(1), 51-80.
Gort, M. (1962). Diversification and integration in American Industry, Princeton, Nj, Princeton University.
Hadlock, J., Michael R., & Shawn T. (2001). Corporate Structure and Equity Offerings: Are There Benefits to Diversification? Journal of Business, 74, 613-635.
Harrison, J. S., Thurgood, G. R., Boivie, S., & Pfarrer, M. D.（2019）. Measuring CEO personality: Developing, validating, and testing a linguistic tool. Strategic Management Journal, 40(8), 1316–1330.
He, X. & Yin, C. (2019). The impact of strategic deviance on analysts’ earnings forecasts: evidence from China. Nankai Business Review International, 10(3), 362-381.
Herrmann, P., & S. Nadkarni. (2014). Managing strategic change: The duality of CEO personality. Strategic Management Journal, 35, 1318–1342.
Hill, C. W., Hitt, M. A., & Hoskisson, R. E. (1992). Cooperative versus competitive structures in related and unrelated diversified firms. Organization Science, 3(4), 501-521.
Hill, C. W., Jones, G. R., & Schilling, M. A. (2014). Strategic management: Theory & cases: An integrated approach. Cengage Learning.
Stimpert, J. L. & Duhaime, M. (1997). Seeing the Big Picture: The Influence of Industry, Diversification, and Business Strategy on Performance. Academy of Management,40(3), 560‐583
Judge, T. A., Bono, J. E., Ilies, R., & Gerhardt, M. W. (2002). Personality and leadership: a qualitative and quantitative review. Journal of Applied Psychology, 87(4), 765-780.
Lartey, T., Kesse, K., & Danso, A. (2020). CEO extraversion and capital structure decisions: the role of firm dynamics, product market competition, and financial crisis. Journal of Financial Research, 43(4), 847-893.
Lu, J. W., & Beamish, P. W. (2004). International diversification and firm performance: The S-curve hypothesis. Academy of Management Journal, 47(4), 598-609.
Maisam A., Christopher G., & Muhammad, N. (2023). A CEO's expertise power and bank diversification. Accounting & Finance. 2023; 00:1–26.
Mansi, S. A. & Reeb, D. M. (2002). Corporate Diversification: What Gets Discounted? Journal of Finance, 57(5), 2167–2183.
McCrae, R. R., & O. P. John. (1992). An Introduction to the Five-Factor Model and Its Applications. Journal of Personality, 60(2), 175–215.
Montgomery C. A. (1994). Corporate Diversification. Journal of Economic Perspectives, 8, 163-178.
Nejat, C., Ravi C., & Fiona S. (2015). Effects of International Diversification and Firm Resources on Firm Performance Risk. Journal of Management and Strategy, 6, 10-20.
Olibe, K. O., Michello, F. A. & Thorne, J. (2008). Systematic Risk and International Diversification: An Empirical Perspective. International Review of Financial Analysis,17(4), 681-698.
Palich, L. E., Cardinal, L. B., & Miller, C. C. (2000). Curvilinearity in the diversification – performance linkage: An examination of over three decades of research. Strategic Management Journal, 21, 155 – 174.
Qian, G., Li, L., Li, J., & Qian, Z. (2008). Regional diversification and firm performance. Journal of International Business Studies, 39(2), 197-214.
Rosenthal, L. & Sullivan, T. G. (1985). Some Estimates of the Impact of Corporate Diversification on the Valuation and Leverage of USA Firms: Estimates from 1972 Data,12(2), 275-284.
Rumelt, R. P. (1982). Diversification Strategy and Profitability. Strategic Management Journal, 3, 359-369.
Wan, W. P., Hoskisson, R. E., Short, J. C., & Yiu, D. W. (2011). Resource-based Theory and Corporate Diversification: Accomplishments and Opportunities. Journal of Management,37(5), 1335-1368.
Wang, S., & Chen, X. (2020). Recognizing CEO personality and its impact on business performance: Mining linguistic cues from social media. Information & Management, 57(5), 103173.
Yue, Q. (2019). CEO EXTRAVERSION AND MANAGEMENT EARNINGS FORECASTS, the C.T. Bauer College of Business University of Houston.